LMX2492EVM: using this EVB with LMX2491

ehud zorea

Part Number: LMX2492EVM
Other Parts Discussed in Thread: LMX2491, LMX2492,

1. i wanna use this EVB to evaluate the LMX2491. can I get it with the LMX2491 on and if not can I replace the device manually

2. can I use the EVB with either lmx2491 and lmx2492 to generate a chirp of 3 to 3.5GHz of a couple of ms.

thank you.

over 3 years ago

0 Noel Fung over 3 years ago

TI__Guru* 81380 points

Hi Ehud,

The functionality of these devices are identical, except for the max. Fin input frequency. You can use the LMX2492EVM to evaluate LMX2491.

Since the frequency ramp function will increment the frequency once per fpd cycle, if your sweep time is long, suggest make fpd smaller and you may also need to enable the RAMPx_DLY bit to make frequency increment once per two fpd cycles.

Don't forget to read the EVM user's guide for some ramp examples.

0 ehud zorea over 3 years ago in reply to Noel Fung

Intellectual 290 points

Can i chirp a 3 to 3.5ghz via this evb with a chirp time of around 3-4 ms? Much thx for the prompt response

0 Noel Fung over 3 years ago in reply to ehud zorea

TI__Guru* 81380 points

Hi Ehud,

Yes, this is doable as long as the fpd is low enough.

Please use TICS Pro to assist your design.

0 ehud zorea over 3 years ago in reply to Noel Fung

Intellectual 290 points

I apologize for the stupid question, but what's FPD in this context.

0 Noel Fung over 3 years ago in reply to ehud zorea

TI__Guru* 81380 points

Hi Ehud,

fpd = phase detector frequency.

Clock & timing

Clock & timing forum

LMX2492EVM: using this EVB with LMX2491